||Landmark name|Date Built|Style|Location|Description|
|---|---|---|---|---|---|
|1|Gridley Building|1867|Second Empire|101 East Water Street|Also known as the Onondaga County Savings Bank Building; 3½ stories; 100 foot clock tower; built of Onondaga limestone; Horatio Nelson White, architect|
|2|Gere Bank Building|1894|Louis Sullivan type|121 East Water Street|5 stories; built of granite, brick and terra cotta; Charles Colton, architect|
|3|Phoenix Buildings (portion)|1834|Federal|123 East Water Street|4 stories; brick|
|4|Phillips Block|1834|Federal|125-127 East Water Street|4 stories; brick|
|5|Phoenix Buildings (portion)|1834|Federal|129 East Water Street|4 stories; brick|
|6|Dana Building|1837, 1861|Federal, Italianate|135 East Water Street|Italianate top floor added in 1861; 4 stories; brick|
|7|Grange Building|1925|Commercial|203 East Water Street|Originally an auto dealership; 4 stories; brown brick|
|8|State Tower Building|1927|Art Deco|109 South Warren Street|22 stories; brick and limestone; Thompson and Churchill, architects|
|9|Granger Block|1869, 1894|Renaissance Revival|200 East Genesee Street|Also known as the SA&K (Sedgwick, Andrews and Kennedy) Building and Ferary Building; first 4 stories built in 1869; upper three stories added in 1894; brick|
|10|Larned Building|1869|Second Empire|114 South Warren Street|5 stories; brick|
|11|Post Standard Building|1880|Richardsonian Romanesque|136 East Genesee Street|5 stories; brick|
|12|Franklin Buildings (portion)|1870|Second Empire|134 East Genesee Street|4½ stories; brick|
|13|Franklin Buildings (portion)||Federal|132 East Genesee Street|4 stories; stone|
|14|Franklin Buildings (portion)|1834|Federal|128 East Genesee Street|4 stories; brick|
|15|Franklin Buildings (portion)|1839|Federal|122-126 East Genesee Street|5 stories; brick|
|16|Flagship Securities Building|1896|Neo-Classical|120 East Genesee Street|3 stories; marble and brick; Albert L. Brockway, architect; first steel-framed building in downtown Syracuse|
|17|Onondaga County Savings Bank|1896|Neo-Classical|113 South Salina Street|9½ stories; granite and limestone; R.W. Gibson, architect; Angelo Magnanti designed plaster ceiling; William Teff Schwartz murals of Onondaga County history|

Question: how many landmarks are in the hannover square historic district?
Answer: 17